Metallic packing.



No. 726,808. PATEN'IZIEID APR. 28, 1903.

W. G. WATSOlfI.

METALLIC PAGKING.

APPLICATION FILED JULY 1, 1902.

N0 MODEL.

' ATTORN UNITED STATES ATENT FFICE.

WVILLIAM GOWIE l/VATSON, OF OGDEN, UTAH.

lVl ETALL IC PACKING.

SPECIFICATION forming part of Letters Patent No. 726,808, dated April 28, 1903.

Applioation filed July 1, 1902. Serial No. 113,910. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM GOWIE WAT- soN, a citizen of the United States, and a resident of Ogden, in the county of Weber and State of Utah, have invented a new and Improved Metallic Packing, of which the following is a full, clear, and exact description.

The invention relates to packings used in steam-engines and other machines; and its object is to provide a new and improved metallic packing which is simple and durable'in construction, very effective in operation, and arranged to positively prevent leakage and undue wear on the piston-rod, valve-stem, or other movable part on which the packing is used.

The invention consists of novel features and parts and combinations of the same, as will be more fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in both views.

Figure l is a longitudinal sectional elevation of the improvement as applied to a piston-rod, and Fig. 2 is a transverse section of the same on the line 2 2 of Fig. 1.

The piston-rodA to be packed by the metallic packing extendslooselythroughachamber B in the head 0 of the cylinder, and on the outer face of the said head is secured a gland D by the usual bolts D. (Indicated in Fig. 2.) A tight joint is formed between the inner edge of the gland D and the face of the cylinder-head (J by a packing E, so that steam can pass from the interior of the cylinder through the chamber B into the gland D, as indicated by the arrows in Fig. 1. Within the gland D and seated on the front flange thereof is a casing F, made ring-shaped, with the central opening somewhat larger than the diameter of the piston-rod A, and the said casing F is provided with a packing-face G, preferably made of soft metal and closely engaging the peripheral face of the piston-rod A. On this face G are seated one or more packing-rings, each made of soft metal and preferably of three sections H, H, and H of which the section H is the bottom section and is larger than either of the other sections H H (See Fig. 2.) The bottom portion of the section H is provided with a longitudinallyextending lug H engaging a corresponding recess in the casing F, so as to prevent the bottom section H from turning in the casing.

The joints Hfbetween the bottom section H and the top sections H and H are beveled and extend outwardly andv upwardly, as plainly indicated in Fig. 2,with thejoint standing nearly tangential to the piston-rod A. The sections Hand H form a radial joint H at the top of the piston-rod, as plainly indicated in the said figure. A spring I, held in the casing F, presses the sections H and H so as to hold the same with a comparatively slight pressure in contact with the piston-rod A, so that when the steam is shut off and the engine is drifting on grades there is no wear on either packing or red.

The upper sections H and H extend with their peripheral faces into a pressure-chamber F, formed in the casing F andin communication with the inner end of the gland D and the chamber B, so that steam from the cylindercan pass into the said chamber F to press the sections H and H inwardly against the piston-rod A and to press the casing F upwardly, so that the lower section H is moved in firm contact with the piston-rod A at the bottom thereof. Now by having the beveled joints H between the sections H, H, and H as described, it isevident that the sections are uniformly pressed against the piston-rod to insure a tight packing and positively prevent leakage of steam past the packing-ring. By having the sections formed with the beveled faces forming the joints H it is evident that resistance is offered to the steam-pressure to hold the latter with only sufficient force in contact with the piston-rod A to prevent leakage, and consequently excessive Wear between the packing-ring and the piston-rod A is completely prevented, and the piston-rod is not liable to wear more at one portion than at another,as isso frequently the case with packings heretofore constructed. By having the radial joint H between the sections I1 and H the latter are not liable to move apart,especially as the beveled faces forming the joints H and the pressure of the steam have a tendency to keep the joint H tightly closed.

The inner face of the packing-ring is pressed on by a follower Jin the shape of a split ring having a seat K for one end of a spring L, extending in the chamber B and resting with its inner end on a ring N, held on the cylinderhead G, and having a bore corresponding to the opening leading from the cylinder to the chamber B, so that steam can freely pass from the cylinder to the chamber and from the latter to the chamber F in the casing F.

The spring-pressed follower J serves to hold the packing-sections H, H, and H in firm contact with the face G.

The device is very simple and durable in construction, not liable to easily get out of order, and is arranged to insure long life to the metallic packing without danger of leakage and without causing irregular wear on the piston-rod A.

Having thus described my invention, I claim as new and desire to secure by Letters Patent-- 1. A metallic packing comprising a sectional packingring, and a casing for the same, the casinghaving a movement relative to the part to be packed and provided with a pressure-chamber connected with a pressure-supply and into which a portion of the periphery of the packing-ring extends, as set go forth.

0 ring made of three sections, of which one seetion has beveled end faces, the other two sections having a radial joint one with the other and beveled end faces fitting the beveled end faces of the first-named section, as set forth.

4. A metallic packing having a packingr-ing consisting of a plurality of sections, of which one is approximately one-half of the packing-ring andformed with beveled end faces, and the other smaller sections provided with correspondingly-shaped beveled end faces fitting the end faces of the larger section, as set forth.

5. A metallic packing having a packingring consisting of a plurality of sections, of which one is approximately one-half of the packing-ring and formed with beveled end faces, and the other smaller sections provided with correspondingly-shaped beveled end faces fitting the end faces of the larger section, the said smaller sections having a radial joint one with the other, as set forth.

, b. A metallic packing comprising a casing having free movement relative to the part to be packed, the casing being provided with a pressure-chamber connected with a pressuresupply, and a packing-ring within the said casing, formed of one large and several smaller sections, of which the smaller sections have beveled-joint connections with the larger section, the said smaller sections being within the pressure-chamber, as set forth.

7. A metallic packing comprising a casing having free movement relative to the part to be packed, the casing being provided with a pressure-chamber connected with a pressuresupply, and a packing-ring within the said casing,formed of one large and several smaller sections, of which the smaller sections have beveled-joint connections with the larger section, the said smaller sections being within the pressm'e-chamber,and having radial-joint connections with each other.

8. A metallic packing comprising a casing having free movement relative to the part to be packed, the casing being provided with a pressure-chamber connected with a pressuresupply, a packing-ring within the said casing, formed of one large and several smaller sections, of which the smaller sections have beveled-joint connections with the larger sec tion, the said smaller sections being within the pressure-chamber, and a spring in the said chamber, pressing the smaller sections, as set forth.

9. A metallic packing comprising a ringshaped casing held in a gland, having free movement in a transverse direction relative to the part to be packed, the said casing having a packing-face of soft metal in the form of a split ring, held on a shoulder on the casing, and a packing-ring within the casing and resting on the said packing-face, the packing-ring being formed of one large and several smaller sections, of which the smaller sections have beveled-joint connections with the larger section, the said smaller sections being within a pressure-chamber in the casing, as set forth.

10. A metallic packing comprising a ringshaped casing held in a gland, having free movement in a transverse direction relative to the part to be packed, the said casing having a packing-face of soft metal in the form of a split ring, held on a shoulder on the casing, a packing-ring within the casing and resting on the said packing-face, the packingring being formed of one large and several smaller sections, of which the smaller sections have beveled-joint connections with the larger section, the said smaller sections being within a pressure-chamber in the casing, and a spring-pressed follower for the said packing-ring, holding the latter to its seat on the said packing-face, as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM GOWIE WATSON.

Witnesses:

J AMES H. \VARDLEIGH, JOSEPH M. DORAN. 

